摘要
研究了粉煤灰-累托石颗粒吸附材料制备工艺条件、再生方法及其处理含重金属废水的条件。颗粒吸附材料制备条件为:累托石∶粉煤灰=1∶1,另加入15%的添加剂(IS)和50%的水,焙烧温度为500℃。在原废水pH值的条件下,颗粒吸附材料用量为0.07 g/mL,反应时间为60 min,吸附温度为25℃时,Cu2+、Pb2+、Zn2+、Cd2+、Ni2+的去除率分别为98.9%、97.5%、96.7%、90.2%、79.1%,处理后的水符合国标(GB8978—1996)一级标准。颗粒吸附材料对Zn2+、Cu2+有很好的选择性。吸附饱和的颗粒吸附材料用1 mol/L氯化钠溶液再生效果好。
The preparation technological conditions and regeneration method of a novel granulated adsorbing material of fly ash and rectorite and the use of it to remove heavy metals from copper smelter industry wastewater were studied.The experimental results showed that under the conditions of the ratio of rectorite and fly ash of 1∶1,the amount of the additive（IS） of 15%,the amount of 50% water,and the calcination temperature of 500 ℃,the efficiency of metal removal with the granulated materials was the best,whereas the ratio of disintegration loss was low.Under the condition of natural pH,and with the addition of the granulated material of 0.07 g/mL,a reaction time of 60 minutes,and the adsorption temperature of 25 ℃,the efficiency for the granulated material to remove Cu^2＋、Pb^2＋、Zn^2＋、Cd^2＋ and Ni^2＋ from copper smelter wastewater was 98.9%、97.5%、96.7%、90.2% and 79.1% respectively,and the quality indexes of the wastewater after treatment conformed with the first level of integrated wastewater discharge standard（GB8978—1996）.Furthermore,it was found that Zn^2＋ and Cu^2＋ showed a strong affinity for the granulated material.When the adsorption of metal ions on the surface attained saturation the granulated material could be regenerated by washing with 1 mol/L sodium chloride（NaCl） solution and still with quite good metal removal efficiency.The granulated adsorbing material had the advantages of high efficiency of wastewater treatment,easy method of solid-liquid separation and regeneration,and a broad prospect of application.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2007年第8期62-66,共5页
Journal of Wuhan University of Technology
基金
国家"973"计划项目(2004CB619204)
教育部科学技术研究重点项目(02052)
关键词
粉煤灰-累托石
造粒
吸附
再生
重金属废水
fly ash and rectorite
granulation
adsorption
regeneration
heavy-metal-containing wastewater
